Exhaust gas recirculation system

Abstract

An exhaust gas recirculation system having at least one cooler with a housing and at least one valve with a pivotably actuated valve member on an inlet side is characterized in that an actuator for the valve is mounted to the housing of the cooler, which is connected to the valve via at least one lever and at least one connection member such as a coupling rod, a ball-and-socket joint being provided between at least one lever and at least one connection member such as a coupling rod.

1. An exhaust gas recirculation system comprising at least one cooler with a cooler housing and at least one valve with a pivotably actuated valve member located on an inlet side within a valve housing and pivoting about a valve axis which valve axis is perpendicular to a first plane, an actuator for the valve being mounted to the cooler housing, which actuator is connected to the valve via at least one lever and at least one connection member, which actuator comprises a rotatable output, wherein the axis of rotation of the rotatable output of the actuator is transversely located relative to the valve axis and wherein the rotatable output comprises one of the at least one lever located in a second plane, a ball-and-socket joint being provided between the at least one lever and the at least one connection member, wherein the first plane and the second plane are non-parallel with each other. 
     
     
       2. The exhaust gas recirculation system according to  claim 1 , wherein the valve member is provided eccentrically at least in one direction with respect to the axis of rotation thereof. 
     
     
       3. The exhaust gas recirculation system according to  claim 1 , wherein the valve member closes a valve seat around its entire circumference. 
     
     
       4. The exhaust gas recirculation system according to  claim 2 , wherein the connection member and at least one lever are at least largely aligned with each other at least in an almost closed state of the valve. 
     
     
       5. The exhaust gas recirculation system according to  claim 1 , wherein the actuator has at least one position sensor. 
     
     
       6. The exhaust gas recirculation system according to  claim 1 , wherein an exhaust gas recirculation valve is provided as the valve, the actuator of which is mounted to the housing of the cooler. 
     
     
       7. The exhaust gas recirculation system according to  claim 1 , wherein a cooler bypass valve is provided on the inlet side, which is integrated into a common housing together with the valve. 
     
     
       8. The exhaust gas recirculation system according to  claim 7 , wherein the bypass valve is connected to a vacuum actuator or an electric actuator. 
     
     
       9. The exhaust gas recirculation system according to  claim 1 , wherein the at least one connection member comprises a coupling rod. 
     
     
       10. The exhaust gas recirculation system according to  claim 1 , further comprising a transmission interposed between the actuator and the at least one connection member. 
     
     
       11. The exhaust gas recirculation system according to  claim 1 , wherein the cooler housing defines a coolant inlet and a coolant outlet, the actuator being located between the coolant inlet and the coolant outlet. 
     
     
       12. The exhaust gas recirculation system according to  claim 1 , wherein the at least one lever comprises a first lever and a second lever, wherein the first lever is the output of the actuator, the second lever is coupled for rotation with the pivotably actuated valve member and the at least one connection member couples the first lever and the second lever. 
     
     
       13. The exhaust gas recirculation system according to  claim 12 , wherein the second lever rotates about the valve axis in the first plane. 
     
     
       14. The exhaust gas recirculation system according to  claim 13 , wherein the first plane is perpendicular to the second plane. 
     
     
       15. The exhaust gas recirculation system according to  claim 1 , wherein the first plane is perpendicular to the second plane.